emmental/sidebar/stack.py

# Copyright 2021 (c) Anna Schumaker.
import db
import lib
from gi.repository import GObject
from gi.repository import Gtk
from . import view

class Stack(Gtk.Stack):
    def __init__(self):
        Gtk.Stack.__init__(self)
        self.set_transition_type(Gtk.StackTransitionType.OVER_UP_DOWN)
        self.set_vexpand(True)

        self.add_page(db.user.Table, "Playlists", "audio-x-generic")
        self.add_page(db.artist.Table, "Artists", "avatar-default-symbolic")
        self.add_page(db.genre.Table, "Genres", "emblem-generic")
        self.add_page(db.decade.Table, "Decades", "x-office-calendar")
        self.add_page(db.library.Table, "Libraries", "folder-music")

        lib.settings.initialize("sidebar.page", "Playlists")
        self.set_visible_child_name(lib.settings.get("sidebar.page"))
        self.connect("notify::visible-child-name", self.change_page)

    def add_page(self, table, name, icon):
        window = view.TableWindow(table)
        self.add_named(window, name).set_icon_name(icon)
        window.get_selection().connect("selection-changed", self.selection_changed)

    def change_page(self, stack, param):
        lib.settings.set("sidebar.page", self.get_visible_child_name())
        self.emit("playlist-changed", self.get_visible_child().get_selected_playlist())

    def selection_changed(self, selection, pos, n_items):
        self.emit("playlist-changed", selection.get_selected_playlist())

    @GObject.Signal(arg_types=(db.playlist.Playlist,))
    def playlist_changed(self, plist): pass


class Switcher(Gtk.StackSwitcher):
    def __init__(self):
        Gtk.StackSwitcher.__init__(self)
        self.add_css_class("large-icons")
        self.add_css_class("osd")
        self.set_orientation(Gtk.Orientation.VERTICAL)
        self.set_stack(Stack())